4:3 aspect ratio

Where 4:3 comes from

4:3 is the shape of pre-widescreen television and of most compact camera sensors. It survives in photography and in slide decks, and it is what a phone camera still produces by default in photo mode on many devices.

Which platforms use 4:3

No spec in the current dataset uses this exact shape.

4:3 in pixels

Every row below is calculated from the ratio rather than looked up, so the heights are exact where the arithmetic is exact and rounded to the nearest whole pixel where it is not. A fractional pixel is not something a file can store.

Cropping and letterboxing into 4:3

Slightly squarer than 16:9. Cropping 4:3 down to 16:9 costs height rather than width, so leave headroom above the subject if the same photo has to work in both.

There are only two honest ways to put an image of one shape into a frame of another. Crop to fill keeps the frame full and throws away whatever does not fit, which is almost always what you want for a feed. Fit inside keeps the whole image and pads the remaining space, which is what you want when the image is a diagram, a screenshot or anything where losing an edge loses meaning. Scaling to fit without doing either, so the image is stretched, is the one option that is always wrong.

Work out a 4:3 size

Enter a width or a height and the calculator solves the other side. It runs in your browser and nothing is uploaded.

Questions about 4:3

Other ratios

See the aspect ratio guide for the shapes side by side, or the full cheat sheet for every size on one page.